Dictionary.com
definitions

amberoid

[am-buh-roid]
noun
  1. synthetic amber made by compressing pieces of various resins at a high temperature.
Also ambroid.

Origin of amberoid

First recorded in 1895–1900; amber + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for amberoid

amberoid

ambroid

noun
  1. a synthetic amber made by compressing pieces of amber and other resins together at a high temperature
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012